1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7effa148942e4b2fad1720821fa104e37a17d2433a45e95d0076fe6a91d8576d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0bcda42-8627-4f0a-8158-3ed80113b377.json and https://artists.proofprofile.net/proofs/artist/e0bcda42-8627-4f0a-8158-3ed80113b377.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f740425d73bb18bcd495b7f4df2ccf034fd61dccc91a1f7f0ef622b2aa9bf0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42348422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd434a2828a1f402a7880992c906aeeab2e17e55b78f67a90c79cc9ce2c835f90. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2227714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd094b0cbf5d0050a36901dae33835afe73423aaec7ca332da48fc53db9440d9c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2326994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe8078741b55a0c3316145bbf6ff80942a5ce52aaa28e194b5e2eac92023eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2326995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d5be64b4268e8be89fa71b78cfab6c5d45b42b1d449f59670deb100b0bedb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2326996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bffc19f119a8a0ae9f11a0d5f2cafba03432e989c4032dd8e3268f463c2f87. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2326997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939ae73847971b40ca1c590b68303a81a5febae10d213ae2359846be8aa5e421. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2326998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ec13446a94f778d861ca9090185449e5ad2e2039a7ea1c1feda4ea73181261. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2326999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c118a8ab59cb518e3a6a3691b6c91f1ded2f225d42c544dad0f3f6e677e19da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8876a00a8792176add95c672d6f4b95142cfd079e0183ee6f067236d7063891d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b2491d66013bb3d6bdee64b418cd52c34e82d62da5ad14b30a31b589daa42. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7821ddc5dca115dd889189390e5763af6f3d453464347e4311be72cd45d9540. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8895b9fde484e673285d34366594cdb6acd22d3c09cc1daff5f3a6065d3ae90. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032d0e7dbf3cb2ef136d1354491111fcefe923d4fac6de66aa78b9bfcc911dcc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c223431e765023fa924df287c809de522f308e39d84abb6f7943a08149ded8e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf59ca7473d6420bb611e6bebe53e9ca2d02466c578547720b927b420a3507e8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f53909d68658ebc3cf22e459bfdd4724e5ac87cc39f3ae7924b76c2acba7404. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2327008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330c8bca27a2d22c847ee0332e399e11c259d0f54d583095d159d99ac79840cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2419302.